async-ify and validate batch file path
async-ify and validate batch file path

hjobrien/desktop,j-f1/forked-desktop,kactus-io/kactus,artivilla/desktop,desktop/desktop,desktop/desktop,gengjiawen/desktop,shiftkey/desktop,gengjiawen/desktop,shiftkey/desktop,j-f1/forked-desktop,hjobrien/desktop,say25/desktop,kactus-io/kactus,j-f1/forked-desktop,gengjiawen/desktop,hjobrien/desktop,desktop/desktop,artivilla/desktop,artivilla/desktop,say25/desktop,desktop/desktop,say25/desktop,hjobrien/desktop,artivilla/desktop,kactus-io/kactus,shiftkey/desktop,j-f1/forked-desktop,kactus-io/kactus,shiftkey/desktop,say25/desktop,gengjiawen/desktop